Concrete-insert.



J.KENNEDY.

CONCRETE INSERT.

APPLICATION FILED APR.30, 1912.

1,052,149 I I Patented Feb. 4, 1913.

wi/tvwooeoz 3 win nfor JOSEPH EENNEDYQOF NEW YORK, 3i. Y.

CONCRETE-INSERT.

Specification of Letters Patent.

Patented Feb. 42,1913.

Application filed April 30, 1912. Serial No. 694,212.

To all whom it may concern:

Be it known that I, 'Josnrrr KENNEDY, a citizen of the United States,and a resident ofthe borough of Bronx, 'city, 'county, and State of NewYork, ha ve iii-vented certain new and useful Improvements inConcrete-Inserts, of which the followingis a speck fication, accompaniedbyfdrawings.

This invention relates to concrete inserts adapted to be secured to themold board of a form of mold into which the concrete or othercementitious material is poured, and thus become embedded in thematerial, so

' that the insert remains after the mold in the form or mold.

boards are removed, and forms a socket or anchorage in the concrete forattaching -various objects.

Difficulty has been experienced in suitably and conveniently fasteningthe insert to a mold board in such manner that the insert is held inproper position and alinement during pouring, and moreover the. ordinarymeans, such as nails or screws for fastening the insert to the moldboard, remain embedded in the concrete, and are objectionable and may beunsightly.

My improved insert is capable of being fastened or contered in positionin the mold preparatory to pouring, by means which come away with themold board, thus leaving 'no nails, screws or other fastening devices inthe concrete, to be afterward'cut 05 or bent backward.

My preferred method of procedure is to fasten a supporting plug, as forinstance of wood, to themold board of the form and support the insertupon the plug, then fill the mold with concrete, and finally remove themold board and'the plug, thereby leaving the insert embedded in theconcrete.

The insert in one of its preferred forms is illustrated in theaccompanying drawings, in which- Figure 1 is a side elevation of vaninsert embodying the invention; Fig. .2 is a top plan view; and Fig. 3is a longitudinal sectional view showing the insertin position Referringto the drawings, A represents an insert embodying the invention, adaptedto be embedded inthe cementitious material B formed in the mold C. Theinsert comprises the shell D, referably cylindrical in form, andpreferaby closed at one end E, by forming the inclosing portion of theshell integrally with the b0 y of the shell;

or by inserting a dot-ted lines.

The shell D may be cast, preferably in one piece, or otherwise suitablyformed and is interiorly threaded at F for a portion of its length, inthis instance the threaded porplug indicated by the tion beingffshownsubstantially midway of the length of the bore, while the remaining endportions G and H of the bore have smooth surfaces and are of greaterdiameter than the threaded portion. The open throat G of the device,having a smooth guiding surface should be elongated and of substantialdepth as compared with the length of the central threaded portion of theshell and affords means for centering a bolt or other fastening device,as it is forced into the insert, and thereby directs the bolt, so thatit will more readily engage the threads F. The enlarged blank or smoothportions G and H of the shell are preferably of substantially'the samediameter and also afford certain manufacturing advantages, because ifthe insert is made from a casting, the enlarged core has a tendency tomake that portion of the casting which is to be threaded free from blowholes, and in tapping the portion to be threaded, a taper tap may gothrough said portion without f0 ow. The smooth throat portion G "alsohas a particular function in enabling me to carry out my improvement aswill hereinafter appear.

The exterior of the shell B is provided with anchoring projections ofany suitable form, in this instance the upper portion of repluiring aseconding or bottoming tap to the insert being provided with a flange Jand webs K extending between the flange and the body portion of theshell. The flange J and webs K prevent both longitudinal and torsionalmovement of the insert,

but I am not to be understood as limiting my invention to any particularanchoring pro ections on the exterior of the demos.

In carrying out my invention 1 provide a plug L of wood or othersuitable material, which is adapted to enter the smooth throat portion Gof the insert and bemaintained' in said end portion by frictionalengagement 1 with the smooth interior surface of the bore This plug L ispreferably slightly tapered,

ngitudinal aperture R to. receive the screw or other The insert may beprovided with the lugs] fastening device P. The plug is preferably firstscrewed to the mold board and then the insert is supported over theplug, as shown in the drawing. After the concrete has been poured andhas s'ufliciently set, .the

mold boards are removed and with them the plug or plugs, therebyleaving-the insert embedded in the concrete.

S at its base, if desired, ada ted to receive nails or screws to aid inhol ing the insert 'upon the mold board, although I prefer to omit theholding lugs S. If such lugs are used, they should be bent backwardlyaway from the lane of the base of the insert, so

.rth'at the insert rests upon the mold board I claim and desire toobtain by Letters- Patent the following:

1. A concrete insert comprising a hollow; shell orcasing having itsparts integrallyi formed from a single piece of metal, anchoring meanson the exterior of the shell, said shell having a cylindrical bore 0 nat one:

end and closed atthe other en the openi with-engaging means for-afastening de-i end of the shell' being adapted to bear flush; against amold board or other support-, the central portion of the bore beingprovided? vice, the integral end portions of the shellj having smoothinterior cylindrical surfaces; Q

and a removable plug adapted tolbe insertedi in the smooth bored endportion at the open? 'end of the shell and be maintained in said; endportion by frictional engagement with I V the smooth interior surface ofthe bore, andZ other support.

means for securing said plug to a mold board or other support, wherebytheinsert is maintained in position during pouring and the plug comesaway from the insert with the mold board or other support.

2. A concrete insert comprising a hollow cylindrical shell or casinghaving its parts integrally formed from a single piece of metal,anchoring means on the exterior of the shell, said shell having acylindrical bore open at one end and closed at the other end,

'theopen end of the shell being adapted to bear flush against a moldboard orother support, the central portion of the bore be ing of smallerdiameter than the remaining integral end portions and threaded to.receive a fastening device, the said end portions of the bore being ofsubstantially the same diameter andhaving smooth interior cylindricalsurfaces, the smooth bored end portion at the o en end of the shellbeing elongated and 0 substantial depth as compared with the length ofthe central thread ed portion of the shell andforming a smooth J throatfor guiding the fastening device into the sald threaded portion, and aremovable plug adapted to be inserted in the. smooth bored open end ofthe shell and be maintained in said end portion by frictional en- 4gagement with the smooth interior surface of the bore, and means forsecuring said plug to a mold board or other support,

whereby the insert is maintained in position from 'the'insert with themold board or In testimony whereof I have signed this during pouring andthe plug comes away specification in the presence of two subscribingWitnesses I i '5 "Users KENNEDY, Wi nesses: i I H l. B.- Moons,

. ELIZABETH ALEXANDER.

